\begin{tikzpicture}
    \tkzDefPoints{0/0/A, 2/0/B, -0.5/0/E, 2.5/0/D}
    \tkzDrawSegments[xianduan={below=0pt}](E,A)
    \tkzDrawSegments[xianduan={below=0pt}](B,D)
    \tkzDrawLine[add=0.2 and 0.2](E,D)
    \tkzLabelPoints[above=.5em](A,B,D,E)
\end{tikzpicture}

